JP2018174772A - 乳酸菌の製造方法、及び免疫調節用組成物 - Google Patents
乳酸菌の製造方法、及び免疫調節用組成物 Download PDFInfo
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Abstract
Description
炎、関節リュウマチ、全身性エリテマトーデス、尋常性乾癬、慢性胃炎、自己免疫性肝炎、バセドウ病などの自己免疫疾患や、スギ花粉症、アトピー性皮膚炎などのアレルギー疾患などが挙げられる。
乳酸菌は、ラクトバシルス・ペントーサスYM2−2菌株(寄託番号FERM AP−21778)(以下、「YM2−2菌」とする。)を用いた。培地には、Difco Lactobacilli MRS Broth(商品名、日本ベクトン・ディツキンソン株式会社)を使用し、35℃下で、最終菌体濃度がおよそ5×109〜5×1010cfu/mLとなるように培養を行なった。培地のpHを調整する場合には、pH自動制御装置(pHスタット)を用いて水酸化ナトリウムでpH6.3±0.1に調整しながら培養を行なった。
培養後の処理を、特に示す以外は次のようにして行った。
IL−10、及びIL−12産生誘導試験にはマウス脾臓細胞の試験管内培養系を用いた。具体的には、8週齢のBALB/cマウスから脾臓細胞を採取し、常法に従い、10% FBS、50μM 2-メルカプトエタノール、100U/mL ペニシリン、100μg/mL ストレプトマイシンを含むRPMI1640培地で細胞浮遊液(2.5×106 cells/mL)を調製した。これに上記の処理をしたYM2−2菌、又はOK432を乾燥物換算で終濃度1μg/mL、又は10μg/mLとなるように添加して細胞/菌体混合液を調製し、96穴プレートの各ウェルに0.2mLずつ撒いた。温度37℃、5%CO2の条件下で、IL−10の場合は3日間、IL−12の場合は1日間培養し、培養後の培養上清を回収して、培養上清中のIL−10、及びIL−12量を測定した。IL−10量の測定には、キット「DuoSet IL-10」(商品名、R&D社)を使用し、ELISA法で測定した。IL−12量の測定には、一次抗体として「capture Ab」、二次抗体として「detection Ab」、検出試薬として「HRP-Avidin」(それぞれ商品名、BioLegend Inc.社)、発色基質として「TMB(3,3’,5,5’tetramethylbenzidin)」(商品名、Sigma. Life Scienc社)を使用し、サンドイッチELISA法で測定した。結果はイムノプレートの6ウェルの平均として求めた。
YM2−2菌及びOK432を使用し(1μg/mL、10μg/mL)、培地にアルカリ剤(水酸化ナトリウム)を添加してpH調節しながら培養(以下、「中和培養」という。)した場合と、pH調節しないで培養(以下、「pH無調整培養」という。)した場合について、得られた乳酸菌のIL−10産生誘導活性(図1)及びIL−12産生誘導活性(図2)を測定した。
乳酸菌は、ラクトバシルス・ペントーサスYM2−2菌株(受託番号FERM P−21778)(以下、「YM2−2菌」とする。)を用いた。培地には、Difco Lactobacilli MRS Broth(商品名、日本ベクトン・ディツキンソン株式会社)を使用し、35℃下で、最終菌体濃度がおよそ5×109〜5×1010cfu/mLとなるように培養を行なった。培地のpHを調整する場合には、pH自動制御装置(pHスタット)を用いて水酸化ナトリウムでpH6.3±0.1に調整しながら培養を行なった。
Claims (5)
- ラクトバシルス・ペントーサスに属し、IL−10産生誘導活性及びIL−12産生誘導活性を有する乳酸菌を、培養に伴うpHの低下を抑制するようにアルカリ剤を添加しつつ培養することにより、IL−10産生誘導活性が残存し、IL−12産生誘導活性がほとんど消失した乳酸菌を生産することを特徴とする乳酸菌の製造方法。
- 前記乳酸菌が、ラクトバシルス・ペントーサスYM2−2菌株(寄託番号FERM AP−21778)である、請求項1記載の乳酸菌の製造方法。
- 培養中のpHが5.0〜7.5の範囲に維持されるように前記アルカリ剤を添加する、請求項1又は2記載の乳酸菌の製造方法。
- ラクトバシルス・ペントーサスに属し、IL−10産生誘導活性を有し、IL−12産生誘導活性がほとんど消失している乳酸菌の菌体及び/又はその処理物を有効成分とする免疫調節用組成物。
- ラクトバシルス・ペントーサスYM2−2菌株(寄託番号FERM AP−21778)の培養物から得られた菌体及び/又はその処理物を有効成分とする請求項4記載の免疫調節用組成物。
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